package com.ruoyi.tongban.utils;

import java.util.Random;

public class RandomUtils {
  
  public static String getString(){
    return getRandomString(6);//默认6个
  }
  
  public static String getRandomString(int length){
    String str="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    Random random=new Random();
    StringBuffer sb=new StringBuffer();
    for(int i=0;i<length;i++){
      int number=random.nextInt(62);
      sb.append(str.charAt(number));
    }
    return sb.toString();
  }
}
